Drilling apparatus.



W` H. FRENCH.

DRILLING APPARATUS.

APPLICATION FILED MAY 16,1912

Patented Dec. 17, 1912.

TINTTED sTATEs PATENT orrioi..

WILLIAM H. FRENCH, OF SEATTLE, WASHINGTON DRILLING APTRATUS.

vhave invented -cert-ain new and useful Improvements in Drilling Apparatus, of which the following .is a speciication.

My invention has for one of its objects the provision of anovel drill driving device especially designed for service in conjunctioir with well sinking tubes.

A further object resides in the provision Aof a device of this character adapted to be t slidably supported on a well sinking tube,

whereby. it is free thereof and 'capable ot loweringby gravity as the work progresses. Other objects will be set forth as my description progresses and those features of construction, arrangements andcombinations ofpartson which I desire protection,

succinctly defined in my annexed claims.

Referring to the accompanying drawing,

.wherein similar reference characters designate cor-responding partsthroifghout: Figure l isa. longitudinal section of my drill drivihgdevic'e'. Fie. 2 is a View vpartly'in .vert-ical4 s ection and -.partly in elevation ported.

showing the de'vice'in connect-ion with. a well sinlinglube, Athe device 'being `elevated `v slightly'oi'i said tube, andFigl Sis. a similar view with `the devicein lowered position.

'Referringto the drawings by numerals of reference, 1 'designatesfa casing conven- 'iently formed of'u'pper and lower sections and having a thro-ugh passageor tube 2, on which latter a' hammer 3 is vshdahly ,sup-

Hammer 3' which isV cylindrical in forni and suitably bored for reception of tube 2, constitutes Va core for .suitable solenoids, as 4 and 5.

Reference numeral G indicates ahead slid- 'ably supported in the lowerend portion of A7 which" is externally screw-thre ded for casing 1 in the path of h ammer 3, and provided on its lower face withan annular boss connection' withv a suitable 'drill bo ,y,^as 8, as sli'own in Figs.- 2 and 3. Tube2, which is of non-magnetizable lmetal, prolects vthrougijh a stufling box 9 ofvhead 6 and has .its upper end threaded in a removable cap 11, olf the casing, and provided with a lock nut `10. Solcnoidsfl and are mounted on spools, as l2, lI-l which latter are heid tween shoulders 14, 15 and 1G, as` clearly' `Ihewn in Fig. 1. These shoulders are in Specification of Letters latent.

the forni of annular iron rings and have screw-threaded engagement in .casing 1.

Patented Dec. 17, 1912. Appiication fiied Mayas, i912. serial No. 697,788.

Shoulder or ring 14' connects the upper and lower casing sections, and like shoulder or ring 16 has its opening of suitable diameter to freelyl receive liamrne'r 3. Shoulder 15' is provided with a tubular extension 15 which extends downwardly into solenoid land has attached thereto a spiralspring'- 1T which serves as a butter for hammer 3 to cushion the. inward or upward movement of `the latter. .i i

Reference numeral 18 indicates a suction pipevwhich normally extends through tube 2 and has swivel connection as vat 22.', with a pipel extension 19 which, lin operation, is connected with a` suitablepumping apparatus, not shown.

Reference nuilsci'als 230, 30 and 31, indicate binding posts mounted on an insulating support 31 of shoulder 15. The-positive terminals of solenoids 4 and 5 are each connected with a respective binding post 30, by lsuitable insulated electric wires, and the negative terminals thereof connected by a common wire with post 31, to which latter the return wire 32 is also connected.

Secured to extension 19 is a bracket 19',

of insulatingmaterial, o'n which are mounted suitable electric brushes 24, 24', 24, f OI.

lcollecting rings 25, 25', 2 5, which brushesare conveniently connected by wires 20,121-4 21 with a. source of electrical energy, no shown, with which the usual commutatornicchanism is yassociated for eeoting the passage of the 'current to the solenoids 4 and 5 alternately.. Cap 11 is providedgwth airintegralnipple 33 to which is Vsoldered u,

the upper sect-ion of pipe 18. This vsection of 'pipe -18 is further provided with ain arm 27 over which'a suitable lengthof tube 28 is looped, the same to be unwo'und when it is found desirable'to lengthenpipe 18 by adding sections thereto as the sinkingl of the well progresses. 1n operation, my device` which is of considerable weight,v Yis 'freely supported on pipe 18, by which construction, it-is permitted to lower` with respect to Vthe suction pipe 4as the underlying material is loosened by the bits of drill .body 8 and subseqiiently re' moved through suction pipe 18. Casing l is convenientlyraised and lowered by means of ropes 40 which are secured' to eye extensions 10v of cap 1l.

Having thus described {ny-invention Awhat I claim as new, and desire to secure by. Letters Patent of the United States of America,

1. In drilling-apparatus, in combination with -a Well sinking tube, a drilling device comprising a casing having a through fiassage freely receivingsaidvwell sinking tube, a drill, means for supporting said drill on said casing, a hammer in said casingrfor driving said drill, and means for operating said hammer.

2. In drillingapparatus, in combination with a Well sinking'tube, a drilling device comprising a casing having a through pas- Y sage freely receiving said well sinking tube, a drill, means for supporting said drill on said casing, a hammer in said casing for l movement thereon by gravity, said drillingl device comprising a casing, a drill supportl ed on said casing, and reciprocatory means l in said casing for operating-said drill.4

Signed at Seattle, lashington this A3rd day of May 1912. I n WILLIAM H. FRENCH.

Witnesses:

STEPHEN BROOKS, AnLrTA Angius, 

